In the present study, eligible patients will be identified by referral to oncology services at one of the participating cancer units. After consent, the baseline registrations will be performed including relevant medical and sociodemographic data, and quality of life. Age related problems will be assessed by clinical indicators covering comorbidity, medication, emotional, physical and cognitive function and nutritional status. Muscle mass will be quantified by analyses of diagnostic CT scans and a biobank will be established for the analyses of inflammatory markers. Upon inclusion, the patients' physician will be asked to rate the patients as fit, frail or intermediate according to the physicians' subjective judgement. The patients will be followed with assessments of quality of life, emotional function and nutritional status (self-report), cognitive and physical function (self-report and performance tests), muscle mass (diagnostic CT scans when available) and inflammatory markers (biobank). Follow up data will also include registry data (hospital records, primary health care registries, The Norwegian Patient Registry, The Norwegian Cancer Registry and the Norwegian Cause of Death registry). We will describe the prevalence of age related problems, investigate the relation between clinical frailty indicators, sarcopenia, inflammatory response and the physicians' subjective evaluation of the patients' health status. The predictive/prognostic impact of frailty indicators on the patients' self-reported physical function and quality of life, hospital and nursing home admittance, treatment toxicity and survival will also be investigated